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C# - Cancel unload of a page in ASP.NET

How can I cancel an unload of a page?
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CipherIS
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CipherIS
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Alexandre SimõesManager / Technology SpecialistCommented:
Refering to the page lifecycle in ASP.net, page unload is the last thing that happens... page is fully rendered, no modifications are possible mainly because everything is already sent to the client.
Page objects are still available but marked to be disposed.

So what exactly do you want to cancel?
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CipherISAuthor Commented:
I need to check hte value of a viewstate and depending on the viewstate value the user will be allowed to continue or must stay on that page.

I put response.redirect on the page.unload but that caused an error.
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Alexandre SimõesManager / Technology SpecialistCommented:
I put response.redirect on the page.unload but that caused an error.
As I told you before, and you can check on the ASP.net request lifecycle, there's nothing you can do on page.unload...

If you try to do a page.redirect on page.unload this means you're trying to redirect after the page is already been sent to the client!

Can't you just do this on Page.Load?
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